Solve the Equation by Completing the Square $x ^ { 2 } - 8 x - 9 = 0$

Solve the equation by completing the square. $x ^ { 2 } - 8 x - 9 = 0$

A) $x = - 2$ , $x = 9$
B) $x = 8$ , $x = 9$
C) $x = 1$ , $x = 9$
D) $x = - 1$ , $x = 9$
E) $x = - 8$ , $x = 2$